function uploadPic(){
    var haha = {
        url: "/file/uploadFile",
        type: "post",
        success: function (data) {
            // img/234984234.jpg
            $("#allUrl").attr("src","../../../"+data);
            $("input[name='imgUrl']").val("../../../"+data);
        }
    }
    $("#jvForm").ajaxSubmit(haha);
}